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1953 Suva earthquake : ウィキペディア英語版 | 1953 Suva earthquake
The 1953 Suva earthquake occurred on September 14 at 00:26 UTC near Suva, Fiji, just off the southeast shore of Viti Levu. This earthquake had a magnitude of Ms 6.8. The earthquake triggered a coral reef platform collapse and a submarine landslide that caused a tsunami.〔〔 Eight people were reported killed;〔 a wharf, bridges, and buildings were severely damaged in Suva.〔 == Tectonic setting == Fiji lies in a complex tectonic setting along the boundary between the Australian Plate and the Pacific Plate. Southwards from Fiji the Pacific Plate is subducting beneath the Australian Plate along the Tonga Trench forming the Tonga Ridge island arc system and the Lau Basin back-arc basin. To the southwest of Fiji the Australian Plate is subducting beneath the Pacific Plate forming the Vanuatu Ridge island arc system and the North Fiji back-arc basin. Hence, the region has undergone a complex process of plate convergence, subduction, and arc volcanism from the Middle Eocene to the Early Pliocene. Many of the larger islands, such as Viti Levu, are of volcanic origin. Volcanism still exists, and there are Holocene volcanos in Fiji. The Fiji Platform lies in a zone bordered with active extension fault lines around which most of the shallow earthquakes were centered. These fault lines are the Fiji Fracture Zone (FFZ) to the north, the 176° Extension Zone (176°E EZ) to the west, and the Hunter Fracture Zone (HFZ) to the east.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「1953 Suva earthquake」の詳細全文を読む
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